GiESCO 2019 banner
IVES 9 IVES Conference Series 9 GiESCO 9 Mapping of canopy features in commercial vineyards using machine vision

Mapping of canopy features in commercial vineyards using machine vision

Abstract

Context and purpose of the study. Vineyard canopy features such canopy porosity and fruit exposure influenced microclimate, fungal disease incidence and grape composition. An objective, rapid and non-invasive method to assess and map the canopy status is needed to apply in precision viticulture. A new method for canopy status assessment and mapping based on non-invasive machine vision was applied in commercial vineyards in this work.

Material and methods. RGB images were acquired on-the-go at night and georeferenced mounting a digital camera in a quad, moving at 5 km/h. The new moving sensing platform, including a GPS-RTK and an illumination system was used in Pinot noir and Macabeo VSP commercial vineyards located in Barcelona (Spain) for producing sparkling wine. RGB images were processed using a new classification algorithm based on the Mahalanobis distance. The pixels were classified in four classes: clusters, leaves, gaps and trellis.

Results. The results were validated using Point Quadrat Analysis as reference method. Canopy porosity and fruit exposure results were mapped in both Pinot noir and Macabeo vineyards. The new RGB image-based methodology has enabled the assessment and mapping of the canopy status of VSP commercial vineyards in an easy and non-invasively way. The new methodology can be adopted by viticulturists to objectively evaluate and map the canopy features as fruit exposure and canopy porosity in commercial vineyards. Decision-making process in the vineyard management could be optimized using this information on key canopy factors.

DOI:

Publication date: September 28, 2023

Issue: GiESCO 2019

Type: Poster

Authors

Javier TARDAGUILA1*, Josep JIMENEZ2, Pere PONS3, Joan Miquel CANALS3, Fernando ZAMORA3, Fernando PALACIOS1, Maria P. DIAGO1

1 Televitis Research Group. University of La Rioja. 26007 Logroño, La Rioja, Spain
2 Juvé y Camps SA. 08770 Sant Sadurní d’Anoia, Barcelona, Spain
3 Departamento de Bioquímica y Biotecnología, Facultad de Enología de Tarragona, Grupo de Investigación en Tecnología Enológica (Tecnenol), Universidad Rovira i Virgili. 43007 Tarragona, Spain

Contact the author

Keywords

non-invasive sensors, sensing technologies, computer vision, precision viticulture

Tags

GiESCO | GiESCO 2019 | IVES Conference Series

Citation

Related articles…

Physiological and growth reaction of Shiraz/101-14 Mgt to row orientation and soil water status

Advanced knowledge on grapevine row orientation is required to improve establishment, management and outcomes of vineyards on terroirs with different environmental conditions (climate, soil, topography) and in view of a future change to more extreme climatic conditions. The purpose of this study was to determine the combined effect of row orientation, plant water status and ripeness level on the physiological and viticultural reaction of Shiraz/101-14 Mgt.

Effects of mechanical leafing and deficit irrigation on Cabernet Sauvignon grown in warm climate of California

San Joaquin Valley accounts for 40% of wine grape acreage and produces 70% of wine grape in California. Fruit quality is one of most important factors which impact the economical sustainability of farming wine grapes in this region. Due to the recent drought and expected labor cost increase, the wine industry is thrilled to understand how to improve fruit quality while maintaining the yield with less water and labor input. The present study aims to study the interactive effects of mechanical leafing and deficit irrigation on yield and berry compositions of Cabernet Sauvignon grown in warm climate of California.

The effects of cane girdling on berry texture properties and the concentration of some aroma compounds in three table grape cultivars

The marketability of the table grapes is highly influenced by the consumer demand; therefore the market value of the table grapes is mainly characterized by its berry size, colour, taste and texture. Girdling could cause accumulation of several components in plants above the ringing of the phloem including clusters and resulting improved maturity. The aim of the experiments was to examine the effect of girdling on berry texture characteristics and aroma concentration.

Application of a fluorescence-based method to evaluate the ripening process and quality of Pinot Blanc grape

The chemical composition of grape berries at harvest is one of the most important factors that should be considered to produce high quality wines. Among the different chemical classes which characterize the grape juice, the polyphenolic compound, such as flavonoids, contribute to the final taste and color of wines. Recently, an innovative non-destructive method, based on chlorophyll fluorescence, was developed to estimate the phenolic maturity of red grape varieties through the evaluation of anthocyanins accumulated in the berry skin. To date, only few data are available about the application of this method on white grape varieties.

Different yield regulation strategies in semi-minimal-pruned hedge (SMPH) and impact on bunch architecture

Yields in the novel viticulture training system Semi-Minimal-Pruned Hedge (SMPH) are generally higher compared to the traditional Vertical Shoot Positioning (VSP). Excessive yields have a negative impact on the vine and wine quality, which can result in substantial losses in yield in subsequent vintages (alternate bearing) or penalties in fruit quality. Therefore yield regulation is essential. The bunch architecture in SMPH differs from VSP. Generally there is a higher amount but smaller bunches with lower single berry weights in SMPH compared to VSP.